Count on Calculator: Simple and Powerful, with big buttons for daily calculations. Start Calculating Now!

Calculator combines the Standard & Scientific calculator, with extensive & easy functionality options. Calculator is Fast, Accurate and Beautiful, it's everything you need right in the palm of your hand!

• Basic Calculation Buttons
• Edit Equation
• Mathematical / Scientific Buttons - hidden in iPhone portrait view
• Calculate with Degrees or Radians
• Percent Button
• Memory Button
• History View: Save, Copy & Forward
• Backspace Button - Slide/Swipe the Result Screen or use the Back Button
• Quick Equation View
• Split View
• Hand off support (continue calculation on other devices via spotlight or app manager)

You can edit both digits and operators of the current equation.

Addition, Subtraction, Division, Multiplication, Percentages
Cubic Exponent, Cubic Root
Engineering Exponent
Nth Exponent, Nth Root
Power of E, Power of Ten, Power of Two
Square, Square Root
Natural Logarithm, Common Logarithm, Binary Logarithm
Sine, Cosine, Tan
Arc Sine, Arc Cosine, Arc Tan
Hyperbolic Sine, Hyperbolic Cosine, Hyperbolic Tan
Hyperbolic Arc Sine, Hyperbolic Arc Cosine, Hyperbolic Arc Tan
Multiplicative Inverse, Random Number Input, Factorial

Terms & Conditions: Privacy Policy:

As always, we appreciate your feedback.
Please email us at with any suggestions or questions.
If you are happy with this update, please let us know by rating and reviewing us in the App Store!

-- COUNT ON --

What’s New

Version 3.3.0

• NEW FEATURE! It is now possible to edit your equations! Edit both operations and operands of an equation. This is going to save you a lot of time, you don't have to write out the whole equation if you mistype!
• Time for a change! Relive the past and get the new Retro theme!* Happy Calculating! *available with a one-time purchase

Ratings and Reviews

4.7 out of 5
138K Ratings

138K Ratings

\TheBatman/ ,

Simple App with Nice Features, but needs Ad Free Option

I like this more than Apple’s default Calculator. Since a recent iOS upgrade, Apple’s Calculator became less responsive. Installed Calculator HD, and enjoyed the simple design and the “History” feature. I can’t tell you how many times I forgot what I just calculated only to wish I had some sort of “back” button.
A major draw back to this App is that it is loaded with ads. There’s a banner on the bottom, and a full screen ad pops up almost every time you load it up. I don’t want ads, and I’m willing to pay a one-time fee to get rid of them, but there isn’t any option like that. The developers also make another Calculator app, but that requires a monthly fee. I think that’s outlandish. I don’t want to pay a continuous fee for a Calculator. That’s ridiculous.

Developer Response ,

Thank you for your feedback. We always appreciate to hear from our users, and do our best to use this to improve our free apps. We have already reduced the advertisements in our apps as a result of this. We will continue to monitor the reactions of our users to better balance the ads, so we can offer the best experience possible. We will take your feedback into account for this as well, and are available for more feedback and suggestions at

If you would like to remove the ads then you can do so by purchasing the Pro version of the app. This can be found in the App Store by searching for ‘Calculator HD Pro’ and has the same functionality but without the ads.

LilaLou ,


I deleted because of an odd setting in app, that would not let me access said setting. Kept popping up as a “failed” attempt to access, when I would try to enter to delete my “remote profile” what ever the f that is even!?!? Most likely just another data stealing/selling tactic like MOST of these apps and OUR cell devices are!!! Simple exploits in the war of tyrants, wringing us dry of every last drop and reduced to data to be sold for profits!
But hey I could be wrong, perhaps the developer would like to chime in and explain what the “remote profile” is and why it is even necessary for a GD calculator app on MY PHONE!?!? Lol (WHAT IS FREEDOM OF CHOICE FOR $5000!?!bahahaaa) And they could further explain why there seems to be a perpetuated bug that makes user incapable of changing this odd setting off!?!?

Developer Response ,

Thank you for contacting us with this issue, and our apologies for the caused inconvenience. We were not aware of this bug yet, and you should be able to erase your remote profile at all times. The remote profile information we gather are basically the same as cookies that websites gather when you're browsing the internet. This is information that we use that is accessible to any app developer, and it helps us show relevant advertisements.

I hope this explains the situation, and would again like to apologise for the caused inconvenience. If you have any other questions or issues in the future then please feel free to contact us at

plane merger man ,

I’m pretty lazy for doing some math so I just pop out calculator 😎😎😎

I’m in 4th grade and I have no struggles. I’m very good at math and I’m almost the #1 smartest student in my class. Buuut I’m on the 3rd smartest in my class ._. I’m good at adding take always times and division. If I need to use calculator then that would mean that I’m too lazy to do a problem or a problem is too big for me to solve. So calculator is here to save the day. Very useful app. Great way to cheat with homework lol but I only do that if absolutely necessary. Btw this is very easy to use. Thx I hope the creator/developer sees this (;


Impala Studios B.V.
99.6 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Dutch, French, German, Greek, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Swedish, Traditional Chinese

Age Rating
Rated 4+
© Impala Studios
In-App Purchases
  1. Retro Theme Calculator' $0.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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